Improved windlass



iINiT-ED" STATESl PATENT Orme a o PETER H. JACKSON, OF NEI/V YORK7 N. Y.

IMPROVED WINDLASS.

To all whom it may concern:

Be it known that I, PETER H. JACKSON, of the city and State of New York,have invented, made, and applied to use a certain new and usefulImprovement in Windlasses; and I do hereby declare the following to be afull, clear, and exact description of the said invention, reference being had to the annexed drawings, making part of this specification,wherein- Figure l is a plan of said windlass. Fig. 2 is an elevation,the windlass-head on one side being shown in section and Fig. 3 is asection transversely of the shaft atthe line m mot Fig. 2.

Similar marks of reference denote the same parts.

The natureof my said invention consists in an improved means forconnecting or disconnecting the windlass heads with the mainratchet-wheels, so that one head may remain stationary while the chainis drawn in. I also employ a peculiar friction mechanism that ar reststhe rotation of the windlass-head while the chain is running out; and Iintroduce sockets for hand-spikes in the ratchet-wheels, so that thecontiguous chain-wheels can be rotated with a quick movement, ifrequired, for any light work, instead of the slow movement ordinarilycommunicated by the brake-levers.

In the drawings, a is the windlass-shaft, snpported by boxes b b on thebit o, and d d on the bits e f f are wheels secured permanently to theshaft a, having ratchet-teeth at l l takingthe pawls g g, and alsosockets at 2 2 for the insertion of a hand-spike, if desired at any timeto turn the windlass quickly when but light work is required, providingthe hand-spikes sockets, as represented, give increased capacity to thewindlass, because the wheels for the chain can be turned quickly orslowly.

7L 71, are chain wheels, forming the windlass itself. Each wheel is madewith recesses adapt ed to the reception of the link of the chain-cable.These chain wheels are loose upon the shaft a, so that said shaft mayrotate without turningthe chain-wheels. I employ a connecting-bolt, t',set in a recess in each wheel f, so that it vmay be drawn entirely intosaid wheel, or its end be projected into a corresponding recess in theface of the wheel h. Each bolt is formed with a mortise through it, inwhich is an eccentric, 3, having an arbor passing through acap securedinthe surface of f, and a square on the outer end of such arbor, wherebythe eccentric can be turned for the projection or retraction of the saidbolt t', and the consequent connection or disconnection of thechain-wheel h with the ratchet-wheelf.

I provide a circular` recess at 4 around each chain-wheel h, thatreceives the friction-strap 7c, the ends of which strap are connected toa block, l, in a box, m. One end of the strap is permanently attached,while the other end may be adjusted by the screw 5'and nut, or in anyother suitable manner. Above this block l is a cam, n, on ahorizontalaxis, and over this, in the box on, is a block, o, that is curved at theupper surface to correspond with the under side of the chain-wheel. Itwill now be seen that when the cam u is turned by a lever applied to itssquare arbor the double cam n forces the block o up and draws down thestrap 7c, producing friction on thefchain-wheel 71, suicient to controlthe letting out of the chain-cable as it runs over and rotates saidwheel h, and there is but little strain on the shaft a. The cam n,acting between the blocks o and l, throws a uniform friction andpressure upon the friction-wheel, and the axis of the cam may bein anelongated bearing, so that the parts will freely accommodate themselvesto the frictionwheel, even without the strap being adjusted in itslength. This friction device may be applied to any part of the chain orother wheel.

fp p represent the upper ends of the chainlocker pipes.

Any ordinary or desired mechanism may be employed to rotate the wheelsf. I have shown the levers q carrying pawls taking the ratchetteeth l.The pawl r in one of these levers is shown more clearly in Fig. 3. It ishung on a center, 6, and provided with a loose liftinglink, s, that doesnot prevent the pawl rising and falling, unless said link is drawn upthrough its slot in q and given a quarter-turn, so that its edges setacross the mortise and hold the link and pawl up.

t is a hand-spike-brake socket, with chains u passing from the endsaround sheaves in the ends of the levers q. These chains may be hookedto eyes o and act as a double purchase, or they may be hooked to the eyeou the under side of the hand-spike sockets t and `form a singlepurchase, as shown in Letters Patent granted to me.

This windlass isstron g and easily controlled in allowing;` the chain torun out or in drawing it in, and either side may be Worked separately,or both operated simultaneously; and my friction device is notinjuriously affected by the parts getting out of linethrongh thestraining or Working of the vessel.

What l claim, and desire to secure by Letters Patent, is-

l. The bolt i, actuated by the cam or eccen tric 3, for connecting ordisconnecting the chain-wheel h from the wheclj', as specified.

2. Thestrap hand blocks l and o,in combination with the cam n,substantially as specified.

3. The Wheel f, provided With hand-spike I sockets 2, in combinationwith the chain-Wheel h and the bolt t' or its equivalent, for connectingor disconnecting the Wheelsfand h, as set forth.

4. The levers q and pawls 1", fitted as specified, in combination withthe ratchet- Wheel f and chain-Wheel 7L, as set forth.

Dated May 5, A. D. 1865.

PETER H. JACKSON.

Witnesses:

LEMUEL W. SERRELL, J AMES E. SERRELL, J r.

